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IR Tables, UCSC Table 1. Characteristic IR Absorption Peaks of Functional Groups* Vibration Position (cm-1) Intensity* Notes Alkanes C-H stretch 2990 – 2850 m to s Alkenes =C-H stretch 3100 – 3000 m C=C stretch 1680 – 1620 (sat.) 1650 – 1600 (conj.) w to m =C-H bend 995 – 685 s See Table 2 for detail Alkynes
This website allows to predict and interactively analyze IR spectra.
Plate and start experiment. Spectrum viewer and comparator. You may drag and drop (or copy paste) to tab-delimited text files in order to compare 2 spectra.
11 lut 2023 · Peak Positions. The equation below gives the frequency of light that a molecule will absorb, and gives the frequency of vibration of the normal mode excited by that light. There are two variables in the above equation - a chemical bond's force constant and reduced mass.
Table of Characteristic IR Absorptions. You can download this chart as a printable acrobat pdf file. m=medium, w=weak, s=strong, n=narrow, b=broad, sh=sharp.
An infrared spectroscopy correlation table (or table of infrared absorption frequencies) is a list of absorption peaks and frequencies, typically reported in wavenumber, for common types of molecular bonds and functional groups.
The following table lists infrared spectroscopy absorptions by frequency regions.
